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arXiv 2103.10850quant-phcond-mat.stat-mech
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从相对熵看量子和经典各向异性

Quantum and classical ergotropy from relative entropies

Akira Sone, Sebastian Deffner

摘要:

量子各向异性量化了在不改变其熵的情况下可以从量子态提取的最大功量。考虑到各向异性可以表示为量子态相对于热态的量子和经典相对熵之差,我们定义了经典各向异性,它量化了从能量表面上的非均匀分布中可以提取多少功。几何量子力学提供了一个统一的方法来处理量子和经典的情况下,我们定义的几何相对熵。分析的结论与应用的概念洞察力的条件热状态,并相应地收紧最大功定理。

英文摘要:

The quantum ergotropy quantifies the maximal amount of work that can be extracted from a quantum state without changing its entropy. Given that the ergotropy can be expressed as the difference of quantum and classical relative entropies of the quantum state with respect to the thermal state, we define the classical ergotropy, which quantifies how much work can be extracted from distributions that are inhomogeneous on the energy surfaces. A unified approach to treat both quantum as well as classical scenarios is provided by geometric quantum mechanics, for which we define the geometric relative entropy. The analysis is concluded with an application of the conceptual insight to conditional thermal states, and the correspondingly tightened maximum work theorem.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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